This Schedule 13G
relates to Common Stock of the Issuer purchased by a private fund to which Anson Funds Management LP and Anson Advisors Inc. serve as co-investment advisors (the Fund). Anson Funds Management LP
and Anson Advisors Inc. serve as co-investment advisors to the Fund and may direct the vote and disposition of the 4,476,192 shares of Common Stock held by the Fund. As the general partner of Anson Funds
Management LP, Anson Management GP LLC may direct the vote and disposition of the 4,476,192 shares of Common Stock held by the Fund. As the principal of Anson Funds Management LP and Anson Management GP LLC, Mr. Winson may direct the vote and
disposition of the 4,476,192 shares of Common Stock held by the Fund. As directors of Anson Advisors Inc., Mr. Nathoo and Mr. Kassam may each direct the vote and disposition of the 4,476,192 shares of Common Stock held by the Fund.

Anson Funds Management LP is a limited partnership organized under the laws of the State of
Texas. Anson Management GP LLC is a limited liability company organized under the laws of the State of Texas. Mr. Winson is a United States citizen. Anson Advisors Inc. is a corporation organized under the laws of Ontario, Canada.
Mr. Nathoo and Mr. Kassam are each Canadian citizens.

Anson Funds Management LP, Anson Management GP LLC, Mr. Winson, Anson Advisors Inc., Mr. Nathoo and
Mr. Kassam are the beneficial owners of 9.9% of the outstanding shares of Common Stock. This percentage is determined by dividing 4,476,192 by 44,875,482, the number of shares of Common Stock issued and outstanding as of January 18, 2019,
as disclosed in the Issuers Prospectus Supplement filed with the Securities and Exchange Commission on January 22, 2019.

(c)

Anson Funds Management LP and Anson Advisors Inc., as the co-investment
advisors to the Fund, may direct the vote and disposition of the 4,476,192 shares of Common Stock held by the Fund. Anson Management GP LLC, as the general partner of Anson Funds Management LP, may direct the vote and disposition of the 4,476,192
shares of Common Stock held by the Fund. As the principal of Anson Funds Management LP and Anson Management GP LLC, Mr. Winson may direct the vote and disposition of the 4,476,192 shares of Common Stock held by the Fund. Mr. Nathoo and
Mr. Kassam, each as a director of Anson Advisors Inc., may direct the vote and disposition of the 4,476,192 shares of Common Stock held by the Fund.

Item 5

Ownership of Five Percent or Less of a Class.

Inapplicable.

Item 6

Ownership of More Than Five Percent on Behalf of Another Person.

Inapplicable.

Item 7

Identification and Classification of the Subsidiary which Acquired the Security Being Reported On by the
Parent Holding Company.

By signing below each of the Reporting Persons certifies that, to the best of such persons knowledge and belief, the securities referred
to above were acquired and held in the ordinary course of business and were not acquired and were not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not
held in connection with or as a participant in any transaction having that purpose or effect.

For the Anson Advisors Inc.,
Mr. Nathoo and Mr. Kassam:

By signing below each of the Reporting Persons certifies that, to the best of such persons
knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in
connection with or as a participant in any transaction having that purpose or effect.